there are a lot of variables, i.e. the condition of the trailer, how many bedrooms, the location of the park and how much you have to subtract in lot fees, taxes and insurance.

Of course, you don't know precisely how these variables will progress over time, but if you can probably make reasonable assumptions based best-case, worst-case and perhaps a few in between scenarios.

That would really increase your calculated hourly wage.There are too many variables to be too definitive.

I know there are a ton of variables to consider, but I'm just trying to get some idea of what to offer.

Thats a tough one to get general info on...there are so many variables depending on where you are located and what type of tax you are speaking of..property vs. income etc...foreclosure vs. seizure as well.Are you a first time investor or first timer in the investing of tax foreclosed properties...because the realm of taxes is not the place to get your feet wet investing in real estate.

I would use a random orbital, variable speed electric hand sander with wet/dry sandpaper on it (grounded plug) and just give that tile a whiz.

How can an adult in this world say with a straight face they got a loan and didn’t know they have a fixed or variable rate mortgage and if a variable rate on what schedule it adjusts.

However, as with ANY investment strategy, there are MANY variables to consider when using this model.

That's your 'Sell for $60k more' variable. 

Annual income =12 * (scheduled rent + other scheduled income)Annual expenses = 12 * (fixed expenses + variable expenses, vacancy included)Cash Flow =Annual income - annual expensesNOI = ?